A Northumbrian monk, born of noble parentage c. 639; d. 729.
In his youth he went for the sake of study to Ireland, to a monastery, says the Venerable Bede, "called Rathmelsigi", identified by some with Mellifont in what is now County Louth. There, when in danger of death from pestilence, he prayed for time to do penance, vowing amongst other things to live always in exile from his own country. In consequence he never returned to England, though he lived to the age of ninety, and always fasted rigorously.
Having become a priest, he was filled with zeal for the conversion of the still pagan German tribes related to the angles, and would himself have become their apostle, if God had not shown him that his real calling was to other work. It was he, however, who dispatched to Friesland St. Wigbert, St. Willibrord, and other saintly missionaries. This strongly indicates he was at some time made bishop.
St. Egbert's own mission was made known to him by a monk, who, at Melrose, had been a disciple of St. Boisil. Appearing to this monk, St. Boisil sent him to tell Egbert that the Lord willed him instead of preaching to the heathen to go to the monasteries of St. Columba, "because their ploughs were not going straight", in consequence of their schismatic practice in the celebration of Easter. Leaving Ireland therefore in 716, Egbert crossed over to Iona, where the last thirteen years of his life were spent.
By his sweetness and humility he induced the Iona monks to relinquish their erroneous mode of computation; in 729 they celebrated Easter with the rest of the Church upon 24 April, although their old rule placed it that year upon an earlier day. On the same day, after saying Mass and joining joyfully in their celebration, the aged Egbert died.
Though he is now honoured simply as a confessor, it is probable that St. Egbert was a bishop. By Alcuin he is expressly called antistes and episcopus, and an Irish account of a synod at Birra names him "Egbert Bishop", whilst the term sacerdos used by the Venerable Bede, is sometimes applied by him to bishops.